1. The largest planet in the solar system, accounting for roughly seventy percent of the total planetary mass, and the fifth from the Sun. The largest and innermost of the gas giants, Jupiter makes an interesting sight through even a modest telescope. Orbits the Sun in 11.86 Earth years. Radiates over twice the energy received from the Sun due to gravitational contraction. Temperature at cloud decks about 143 degrees Centigrade below zero. Pronounced equatorial bulge; diameter through the equator is 88,846 miles (to within five miles, measured to the altitude where gas pressure equals that of Earth's air at sea level); diameter through the poles is 83,082 miles. Mass over 317 times that of Earth, volume over 1,321 times that of Earth. Composed mostly of gas, chiefly hydrogen with a considerable amount of helium; traces exist of ammonia, water vapour, methane, ethane, silicon compounds, carbon compounds and sulphur, among others. At greater depths the hydrogen enters molecular and then metallic states not found among gases on Earth; there may be a rock-metal core accounting for perhaps five percent of the planet's mass. The planet does not rotate on its axis as a solid body, but faster in the equatorial regions than around the poles, by about five minutes per rotation; the whole turns once on its axis in just under ten hours. The entire visible face of the planet consists of clouds in the upper reaches of a vast ocean of gas. Has a striped appearance with lightzones of upwelling gas and dark, descending belts; there are numerous rotating storm systems, the largest and longest-lived of which is the Great Red Spot, a storm larger than the Earth. Jupiter's powerful magnetosphere, its trailing end still detectable at the orbit of Saturn, funnels considerable amounts of ionising radiation, carrying at its strongest one thousand times the lethal dose for the humanbody. Jupiter receives comparatively many asteroid and cometary impacts, recently including the string of impacts from the tidally disrupted comet Shoemaker-Levy 9 in 1994. Visited by Pioneer, Voyager, Galileo and Cassini probes. Recognised to have 63 satellites at last count; the largest of these, Io, Europa, Ganymede and Callisto, are collectively known as the Galilean satellites because they were discovered by Galileo Galilei in 1609-10. (This made them the first extraterrestrialmoons discovered, which made for an epochal discovery.) Ganymede is the largest moon in the solar system and is larger than, though not as massive as, the planet Mercury. Europa is thought a possible abode for extraterrestrial life.

A company that makes music stuff. I don't know about their other instruments, but their trombones suck. Don't get a jupiter trombone, unless you want to really be able to apreciate a half decent trombone. Their other instruments probably suck as much.

I played a jupiter trombone in sixth grade that we rented. In seventh I asked for a yamaha because they looked cooler. The slide is much easier to move and the instrument itself is much lighter. It's still not all that great, but it's good enough for a highschooler. We've continued to rent the same trombone for three years now and some day I'm going to buy it out of slavery, for sentimental value if nothing else, even though I really could use one with an f key.

(Historically accurate): Name of a negro slave from the Civil-War time period of American History.

Racist Slaveowner: Jupiter get your ass over here before I whoop ya'!
Other Racist: Why'd y'all name your negro Jupiter?
Racist Slaveowner: It's powerful sound and reference to Roman god of all gods, also revered as Jove, instills some pride in me when I call his name.